... Shape: Rectangle Quality certification: SGS Specifications Optical parallel glass block raw material Size:according to customer requirementColor:clearQuality: K9,BaK7 ... reflective mirror of telescope,microscope,camera, riflescope, level,digital TV,DVD, mobile phone panel and so on. Performance parameters of ... .6204160.340.010281H-ZK111.6385455.450.011516 optical glass block for optical instrument